As climate change has heightened concerns about the global decline of mangroves, a study released this week found that such ecosystems along the desert coast of Baja California may be more important than previously thought for keeping heat-trapping carbon dioxide out of the atmosphere.

Researchers at UC San Diego’s Scripps Institution of Oceanography discovered that despite their short and stunted appearance, mangroves in these desert locations had surprisingly high rates of sequestering carbon underground. In some cases, the ability was several times greater than that of lush mangroves in tropical locations.